Multiterminal electrical socket



Sept. 13, 1932. c. M. METELSKI MULTITERMINAL ELECTRICAL SOCKET Filed Dec. 15. 1950 (Jamie fifieteds A a' ATTORNEYS Patented Sept. 13, 1932 UNITED STATES PATENT OFFICE CLAUDE M. METELSKI, OF DETROIT,

OF NEW HAMPSHIRE MULTITERMINAL ELECTRICAL MICHIGAN, ASSIGNOR T0 SPAULDING FIBRE COM- PANY, INCORPORATED, OF NORTH ROCHESTER,

NEW HAMPSHIRE, A CORPORATION SOCKET Application filed December 15, 1930. Serial No. 502,601.

The invention relates to inulti-terminal electrical sockets of that type such as are used with radio tubes and similar electrical devices. It is the object of. the invention to simplify the construction and to avoid certain detrimental features in constructilons as heretofore used. To this end the invention consists in the construction as hereinafter set forth.

In the drawing:

Figure 1 is a perspective view of my improved terminal socket;

Figure 2 is a section showing the socket as mounted upon a supporting front plate;

Figures 3, 4, and 5 are similar views showing modified constructions.

Sockets of the type above referred to are usually formed to receive .four or more separate contact pins on the radio tube or other electrical device and are provided with co operating contact members and electrical connections for each of said pins. The socket usually comprises an insulator plate perforated to register with the several contact pins of the tube and the metallic contacts for cooperating with said pins are secured adjacent to these apertures so as to yieldably press against the pins when entered therein. These contacts are secured in various ways such as by providing them with securing portions which are placed between the apertured insulator plate and a superposed insulator plate or in some cases by riveting directly to the apertured plate. However, it is necessary to protect the rivet heads so as to avoid short-circuiting which requires the use of another insulating plate.

To simplify the structure I have devised a construction dispensing with the superposed insulator plate and employing a single formed insulator plate having the apertures for the contact pins and forming a mounting for the cooperating contact members, also forming a guide for directing the pins into their respective apertures and avoiding any danger of short-circuiting. All of these functions are thus performed by a single member which may be fashioned from suitable material such as bakelite and whichv is i that the portion adapted for mounting on the inside of a supporting panel.

As shownin Figure 1, the member A is formed from a sheet of insulating material such as bakelite which is mounted to provide securing ears B on opposite sides thereof, a depressed intermediate portion C and upturned reinforcing flanges D at the peripheral edge thereof extending between ears B.

As shown in Figures 1 and 2, the member A is further provided with an annular groove E depressed therein in which groove the apertures F for the several contact pins are formed and properly distributed. Thus the groove will form a guide channel for the contact pins of the radio tube and facilitate the entrance of said pins into their proper apertures. The cooperating contact members G may be of any suitable construction but as shown are formed from strips of metal having a central portion Gr riveted to the portion O of the member A outside of the groove E. The members G are further provided with a return bent end portion Gr extending into the path of the contact pin and preferably bifurcated as shown to form a double line contact on the pin. The opposite end of the member G is bent obliquely outward as indicated at G and forms a means for securing the electrical conductor to the contact.

With the construction as thus far described the member A may be mounted upon a panel such as H by securing the ears B to said panel by screws or other fashioning devices. The panel is apertured at I for the passage of the contact pins which aperture is, however, slightly less in diameter than the base of the radio tube so as to provide an 'annular support for the latter. Due to the fact C is depressed the heads of the rivets J which secure the contacts G. to themember A will be spaced from the panel to avoid any danger of short-circuiting. These rivet heads are further protected by the portion of the panel surrounding the aperture I and which overlaps the same.

As a modification of the structures shown in Figures 1 and 2 I may form the plate A with a centrally depressed portion K in place of the groove E, the shoulder between this portion and the portion G forming a for contacting with the outer sides 0 the pins. Another modification is shown in Figure 4 Where the central portion L is raised above the plane of the portion C and forms a guide for the inner side of the contact pins. In Figure 5 another modification is shown where the greater portion of the insulator plate liesin the plane of the ears B but is provided with depressed sockets M for receiving the heads J of the rivets which secure the contact members G in position. The guide for the pins is shown as formed by an annular groove E similar to that in F igures 1 and 2, but it is obvious that either of the constructions shown in Figures 3 and 4 may be used in place thereof.

The construction as above described can be manufactured at low cost due both to the simplicity of the elements and the ease with which they may be assembled. The material from which the plate A is formed is as above stated preferably bakelite and preferably of that variety in which the material is reinforced by a fabric base as this imparts a high degree of strength to the plate even where it is made of comparatively thin material. Furthermore, the dispensing with superposed insulating plates for either securing the contacts or for protecting the same from short-circuiting, simplifies the structure and decreases the time required. for its assembly.

What I claim as my invention is: p

1. A multi-terminal' electrical socket comprising an insulator plate provided with means for securing to a mounting panel, being dished between said securing means and provided with apertures in the dish portion for receiving the several contact members, contacts mounted on the oppositeside of the dish portion adjacent to the respective apertures and securing means for said contacts extending through said plate and having headed portions in the dish portion of the plate held thereby in spaced relation from said panel. v

2. A multi-terminal electrical socket comprising an insulator plate provided with means for securing the same toa mounting panel, saidplate being dished between said securing means to depress the same from the plane of the mounting panel and to provide a reinforcing flanged peripheral portion, be

ing also provided in the dish portion with apertures for receiving the contact pins, contact members mounted on the opposite side of said plate adjacent respectively to said apertures and rivets for securing said contact members having their heads engaging the dished portion of said plate and held thereby from contact with said panel.

-3. A multi-terminal electrical socket comprising an insulator plate provided with means for securing the same to amounting uide panel and having tact members mounted a dished portion intermediate said securing means, apertured for the passage of the terminal contact pins and having a peripheral reinforcing flange portion,

and an annular guide shoulder formed in said plate adjacent to the apertures for said I contact pins forming a means for guiding the latter into said apertures. 1

4. A multi-terminal electrical socket comprising an insulator plate having means for securing the same to a mounting panel and dished intermediate said securing means into a plane spaced from said panel, said dished portion being provided with a series of apertures for receiving the several contact pins and having a depressed annular guide groove in alignment with said apertures, and contact members mounted on the opposite side of said plate adjacent to the respective apertures.

5. A multi-terminal electrical socket comprising an insulator plate having means for securing the same to a mounting panel and dished intermediate said securing means into a plane spaced from said panel, said dished portion having a further dished central portion and a series of apertures for the passage of the pin terminals in said further dished portion, the annular shoulder between said dished portions forming a guide for said pins into registration with said apertures, and contacts mounted on. the opposite sides of said plate adjacent to the respective apertures.

6. A multi-terminal electrical socket comprising an insulator plate having means for securing the same to a mounting paneland dished intermediate said securing means into a plane spaced from said panel, said dished portion having a series of apertures therein for receiving the several pin contacts and being further provided with a central raised portion adjacent to the inner side of said apertures forming a guide for registering said pins with their respective apertures and conon the opposite side of said plate adjacent to the respective apertures.

In testimony whereof I aifix my signature.

CLAUDE M. METELSKI. 

